Deep well pump



Feb. 7, 1939. O l wjB RB 2,146,500 v DEEP WELL PUMP Filed April 2', 193s.

Patented Feb. 7, 1939 UNITE-D. STATES PATENT y OFFICE DEEP WELL PUMP William B. VE

Application April 2,

3 Claims.

This invention relates to doub'leeacting pumps for deep wells, and its purpose is to provide an improved pump of this type adapted for econo rnical production and involving some simplifi- 5 cation as compared with previous pumpsr of this character. It consists of certain features and elements of construction in combination as herein shown and described and as indicated rby the claims.

In the drawing:

Figure 1 is an axial section'of a pump embodying this invention.

VFigure 2 is an axial section of the upper portion of the pump casing and its head tting showing the valve in open position,r and being taken at right angles to the plane of Figure l to show certain details o f the piston structure.

Figure 3 is a transverse section taken as indicated at line 3- 3 on Figure l.

Figure 4 is a transverse section taken as indicated at line 4-4 on Figure l.

Figure 5 is a transverse section taken as indicated at line 5-5 on Figure 1.

Figure 6 is a transverse section taken as indicated at line 6 5 on Figure l.

As shown in the drawing, the pump cylinder comprises a shell I threaded at its lower end for connection witha Yfitting 2 and threaded at its upper end for connection with a headftting 3. snugly tted into the fitting 2 with its flange 4a resting o n a shoulder 22L thereof. A ball valve 5 is retained adjacent the Valve seat by a cage 6 which is screwed' onto the externally threaded seat portion of the member 4, incidentally serving to retain thereon an encompassing cup leather l.

VThe cylinder head iitting 3 includes an upwardly opening, internally threaded portion 3a adapted to connect with the Well casing, not shown, and below this portion there is inserted a head member 8 tapered at 8a to seat in the tapered portion of the bore of the tting 3. rI'he head 8 includes an axially located and rather elongated guide bearing 9 for the pump rod Il), and at the upper end this guide terminates in a threaded portion onto which there is screwed an annular metallic member II forming a stufng box with packing I2 enclosed and clamped against the end of the guide. vExternally, the member II lits into a cup leather I3 which is lodged upon the transverse end wall 8b of the head 8 and bears against the bore of the head tting 3 to supplement the taper 8a in sealing the head intor the fitting 3. The upper edge of At the lower end a valve seat member 4 isy rb, Chicago, Ill.

1936, Serial No.4 72,303

(Cl. 10S-192) the cup leather I3v is'thus exposed to the pressure of the water column in the well casing, rendering it self-sealing to a certain extent.

Just below the transverse wall 8b the head tti-ng 3 and the head 8 are provided with registering" po-rts I4 and I5 to communicate with downwardly open ports I6 in the head 8, controlled by an annular valve `member Il, which may be of rubber or other suitably compressible material. flanged ring I8 slidably' movable over the externalsurface of the guide 9 and yieldingly urged toward the valve seat by a coil spring I9 reacting against a flanged collar 20 which is screwed onto the lower end of the guide 9.

It will be understood that the ball valve 5 acts as a check valve controlling inow of water into the lower end of the pump casing during the upstroke of the pistonWhile the ports I4, I5 and I6 and the valve I'I permit the intake of water into the upper end' of the pump casing dur-i ins the downvstroke 0f the piston.

The piston comprises a central hollow casting 2I whosebore terminates upwardly in a valve seat g2 controlled by ga ball valve 23 and affording communication with the chamber of a shell Z4 which forms the upper end of the piston and is connected thereto by threads at 25. A hollow bridge 2S, extending across the chamber of the shell 24, opens downwardly through a port terminating in a valve seat 21 positioned directly over theball valve 23, so that on the down? stroke of the piston the valve is lifted from its seat 22 and shifted to the seat 21. The bridge 26 opens laterally through the shell 24 at ports 28, and adjacent these ports the external wall of the shell 2 4 is cut down to aiord a clearance space 29 for theflow of water passing through the ports 28.

The piston is packed in substantially the usual manner, by means of cup leathers 30 carried on its cylindrical body portion 2| and retained in position by a terminal fitting 3l screwed onto the lower end of said body. Preferably, this fitting 3| is formed as a yoke supporting an internally threaded annular part 32, and the valve cage 6 is also provided with a centrally threaded annulus 6b at its `upper end, so that if it is desired to remove the valve 6, with its valve 5, the piston may be lowered with a threaded nipple (not shown) screwed into the part 32 and then by rotating the piston the nipple may be engaged with the threads of the part 6b, serving as a temporary coupling for hoisting the valve cage.

The valve I I is held to its seat by a 10 The operation of the pump and its valves, as just described, is as follows: Upon the upf-stroke of the piston its ball Valve 23 is seated at 22, and the suction in the lower part of the casing l draws water into the lower fitting 2 past the ball valve 5. At the same time, any water in the casing above the piston is forced into ports 28 of the bridge 26, and thence through port 2'! into the chamber of the shell 24, and upwardly through the hollow pump rod l0.

At its upper end the first section I0 of the pump rod is connected to the next section llla by a guide and coupling member 40, which includes a central threaded sleeve portion 4l into which the pump rod sections l0 and IIJa are entered from opposite ends. 'I'he sections I0 and lila are spaced apart in the coupling, and the coupling sleeve 4| is formed with ports 42 through which the water may escape from the interior of the pump rod. Radial web portions 43, connect the central portion 0H with an outer cylindrical wall M, whichts loosely in the well casing (not shown) for guiding the pump rod as it reciprocates therein.

Upon the down-stroke of the piston the check valve 5 is seated, thus trapping in the lower portion of the pump cylinder the Water which has entered during the up-stroke, and, as the piston descends, this water passes up through the hollow body 2|, past the check valve 23, into the chamber of the shell '24, and up through the pump rod lil for escape at the ports 42. The downward movement of the piston producing suction in the upper portion of the cylinder I opens the annular valve I1, in opposition to the force of its spring I9, drawing water through the ports lli and I6 into the upper end of the cylinder I.

It will be noted that in the design of the cylinder head fittings all the parts of the head 8 below the tapered seat 8e are within the small diameter of said tapered seat, so that for the purpose of repair or replacement the cylinder head may be readily removed by merely pulling up on the pump rods with sufcient force to dislodge the head from its tapered seat. The valve Il, with its spring and retaining collar 2li, will then pass upward through the cylinder head tting 3 and through the well casing.

I claim:

1. In a double-acting pump including a pump cylinder, a cylinder head tting comprising a cylindrical member connected at its lower end to the pump cylinder and adapted for connection at its upper end to a well casing, said member having a straight cylindrical bore adjacent its upper end continuing in a downwardly tapering bore, with a lateral inlet port disposed between said straight and tapering bores, a removable cylinder head having a tapered portion to seat in the tapered bore and having a lateral inlet port leading to the cylinder and registering with that of the head fitting when the head is so seated, together with an upwardly open cup leather secured to the top of the head with its cylindrical portion engaging the wall of the straight cylindrical bore of the head fitting and with the edge of said portion exposed upwardly to the pressure in the well casing.

2. In a double-acting pump including a pump cylinder, a cylinder head tting comprising a cylindrical member connected at its lower end to the pump cylinder and adapted forY connection at its upper end to a well casing, said member having a straight cylindrical bore adjacent its said upper end, a removable cylinder head having a transverse end wall dimensioned to t in said cylindrical bore ofV the tting with a central upstanding annular portion externally threaded and internally bored to serve as a pump rod guide, an upwardly open cup leather seated upon said end wall ofthe cylinder head with its cylindrical portion engaging the cylindrical wall of the head fitting and a downwardly open cupshaped cap member screwed onto the threaded annular guide within the cup-leather for securing the cup leather in position, together with packing confined withinV the cup form of said cap and clamped thereby against the end of said threaded annular guide, thus forming a stuffing boX for a pump rod.

3. A double-acting pump comprising a cylinder, a fitting at the lower end thereof comprising an inlet port and a downwardly seating check valve thereon, a cylinder head fitting comprising a cylindrical member connected at its lower end to the pump cylinder and adapted for connection at its upper end to a well casing, said member having a straight cylindrical bore adjacent its upper end continuing in a downwardly tapering bore, with a lateral inlet port disposed between said straight and tapering bores, a removable cylinder head having a tapered portion to seat in the tapered bore and having a lateral inlet port leading downwardly into the cylinder and registering with that of the head fitting when the head is so seated, an upwardly seating check valve in the upper end of the cylinder controlling said port, said cylinder head having a transverse end wall dimensioned to fit in the cylindrical bore of the head tting with a central upstanding annular portion externally threaded and internally bored to serve as aV pump rod guide, an upwardly open cup leather seated upon said end wall of the cylinder head with its cylindrical portion engaging the cylindrical wall of the head fitting, a downwardly open cup-shaped cap member screwed onto the threaded annular guide within the cup leather for securing the latter in position, packing material conned within the cup form of said cap and clamped thereby against the end of said threaded annular guide to form a stuing box for a pump rod;l a piston in the cylinder with a hollow piston rod passingV through said guide and provided with a port discharging above the cylinder head, said piston including a downwardly open passage with a downwardly seating ball valve controlling it, a port spaced above said valve adapted to be closed thereby, a passage leading from said port through the piston into the upper portion of the cylinder, and a by-pass through the piston around said port leading to the hollow piston rod.

WILLIAM B. ERB. 

